We've heard the tune urging women to stand by their men, but it's nice to see the same works in reverse for the newly engaged Johnny Depp and Amber Heard.

Depp accompanied his fiancée to the Los Angeles premiere of her film, "3 Days to Kill," on Wednesday night and the typically camera shy twosome kissed, held hands, and proudly posed for pictures together on the red carpet. Heard stunned in a long-sleeved dress with a thigh-high slit and plunging neckline, while Johnny looked sharp in a matching navy suit.

While Amber has traveled the world to support Johnny -- she was a behind-the-scenes staple during his "The Lone Ranger" press tour -- this is the first time we've seen the actor return the favor. And no complaints here! That is one good looking (and color-coordinating) couple.

Depp, 50, and Heard, 27, made their first official public appearance together just last month after more than a year of dating. And, aside from promoting their joint venture, "The Rum Diary," in 2011, Wednesday night marked the first red carpet they've ever walked as a couple.

Amber has yet to discuss her beau publicly, although in July she opened up a bit about their relationship.

"It's not part of my professional life," Heard said firmly in Flare magazine, referring to her personal life. "I want to be an artist. I don't want to be a celebrity … Can you ever imagine yourself in a situation like Brad Pitt and Angelina Jolie or Kim Kardashian and Kanye West, where the world feels like they have a stake in your private life? I would never want it."

Still, Amber also said she won't go out of her way to avoid PDA.

"I guess I could not hold hands with who I want to, but what kind of life would that be?" she explained. "I don't want to change just because people are watching. I've always been the person who says what she wants."

Depp secretly popped the question to Heard a while ago, and her beautiful (huge!) engagement ring was on full display Wednesday night.

"3 Days to Kill," which also stars Kevin Costner and Hailee Steinfeld, hits theaters on Feb. 21.